21443000042443 has 8 divisors (see below), whose sum is σ = 25351330099680. Its totient is φ = 17745931069440.

The previous prime is 21443000042437. The next prime is 21443000042473. The reversal of 21443000042443 is 34424000034412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21443000042443 - 2⁵ = 21443000042411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21443000042473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52815270838 + ... + 52815271243.

It is an arithmetic number, because the mean of its divisors is an integer number (3168916262460).

Almost surely, 2^{21443000042443} is an apocalyptic number.

21443000042443 is a deficient number, since it is larger than the sum of its proper divisors (3908330057237).

21443000042443 is a wasteful number, since it uses less digits than its factorization.

21443000042443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105630542117.

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 21443000042443 its reverse (34424000034412), we get a palindrome (55867000076855).

The spelling of 21443000042443 in words is "twenty-one trillion, four hundred forty-three billion, forty-two thousand, four hundred forty-three".